Context A Node.js application connects to a database using credentials currently hard-coded in the source code, creating a security risk. The Problem Database credentials and API keys are committed to the git repository in plain text. Current Code const db = connect("postgres://admin:secret123@localhost/mydb"); Constraints Use the dotenv package to load variables from a .env file. Access credentials via process.env. Add .env to .gitignore and provide a .env.example template. Expected Deliverable A Node.js application loading all sensitive configuration from environment variables using dotenv, with a .env.example file documenting required variables.